/*************************************************************************** * Nping.cc -- This file contains function main() and some other general * * high level functions. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2012 Insecure.Com LLC. Nmap is * * also a registered trademark of Insecure.Com LLC. This program is free * * software; you may redistribute and/or modify it under the terms of the * * GNU General Public License as published by the Free Software * * Foundation; Version 2 with the clarifications and exceptions described * * below. This guarantees your right to use, modify, and redistribute * * this software under certain conditions. If you wish to embed Nmap * * technology into proprietary software, we sell alternative licenses * * (contact sales@insecure.com). Dozens of software vendors already * * license Nmap technology such as host discovery, port scanning, OS * * detection, version detection, and the Nmap Scripting Engine. * * * * Note that the GPL places important restrictions on "derived works", yet * * it does not provide a detailed definition of that term. To avoid * * misunderstandings, we interpret that term as broadly as copyright law * * allows. For example, we consider an application to constitute a * * "derivative work" for the purpose of this license if it does any of the * * following: * * o Integrates source code from Nmap * * o Reads or includes Nmap copyrighted data files, such as * * nmap-os-db or nmap-service-probes. * * o Executes Nmap and parses the results (as opposed to typical shell or * * execution-menu apps, which simply display raw Nmap output and so are * * not derivative works.) * * o Integrates/includes/aggregates Nmap into a proprietary executable * * installer, such as those produced by InstallShield. * * o Links to a library or executes a program that does any of the above * * * * The term "Nmap" should be taken to also include any portions or derived * * works of Nmap, as well as other software we distribute under this * * license such as Zenmap, Ncat, and Nping. This list is not exclusive, * * but is meant to clarify our interpretation of derived works with some * * common examples. Our interpretation applies only to Nmap--we don't * * speak for other people's GPL works. * * * * If you have any questions about the GPL licensing restrictions on using * * Nmap in non-GPL works, we would be happy to help. As mentioned above, * * we also offer alternative license to integrate Nmap into proprietary * * applications and appliances. These contracts have been sold to dozens * * of software vendors, and generally include a perpetual license as well * * as providing for priority support and updates. They also fund the * * continued development of Nmap. Please email sales@insecure.com for * * further information. * * * * As a special exception to the GPL terms, Insecure.Com LLC grants * * permission to link the code of this program with any version of the * * OpenSSL library which is distributed under a license identical to that * * listed in the included docs/licenses/OpenSSL.txt file, and distribute * * linked combinations including the two. You must obey the GNU GPL in all * * respects for all of the code used other than OpenSSL. If you modify * * this file, you may extend this exception to your version of the file, * * but you are not obligated to do so. * * * * If you received these files with a written license agreement or * * contract stating terms other than the terms above, then that * * alternative license agreement takes precedence over these comments. * * * * Source is provided to this software because we believe users have a * * right to know exactly what a program is going to do before they run it. * * This also allows you to audit the software for security holes (none * * have been found so far). * * * * Source code also allows you to port Nmap to new platforms, fix bugs, * * and add new features. You are highly encouraged to send your changes * * to the dev@nmap.org mailing list for possible incorporation into the * * main distribution. By sending these changes to Fyodor or one of the * * Insecure.Org development mailing lists, or checking them into the Nmap * * source code repository, it is understood (unless you specify otherwise) * * that you are offering the Nmap Project (Insecure.Com LLC) the * * unlimited, non-exclusive right to reuse, modify, and relicense the * * code. Nmap will always be available Open Source, but this is important * * because the inability to relicense code has caused devastating problems * * for other Free Software projects (such as KDE and NASM). We also * * occasionally relicense the code to third parties as discussed above. * * If you wish to specify special license conditions of your * * contributions, just say so when you send them. * * * * This program is distributed in the hope that it will be useful, but * * WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Nmap * * license file for more details (it's in a COPYING file included with * * Nmap, and also available from https://svn.nmap.org/nmap/COPYING * * * ***************************************************************************/ #include "nping.h" #include "output.h" #include "NpingOps.h" #include "utils.h" #include "utils_net.h" #include "nsock.h" #include "global_structures.h" #include "ArgParser.h" #include "EchoHeader.h" #include "EchoClient.h" #include "EchoServer.h" #include "ProbeMode.h" #include "common.h" #include "dnet.h" #include "pcap.h" #include #include #ifdef WIN32 #include "winfix.h" #endif using namespace std; NpingOps o; EchoClient ec; EchoServer es; int do_safe_checks(); void test_stuff(); void signal_handler(int signo); /** Main function. It basically inits Nping working environment, calls the * command-line argument parser, and enters the appropriate mode (normal * probe mode, echo client or echo server). */ int main(int argc, char *argv[] ){ struct tm *tm; /* For time display */ time_t now; /* Stores current time */ char tbuf[128]; /* Stores current time as a string */ ArgParser a; /* Command line argument parser */ unsigned long int i=0; ProbeMode prob; NpingTarget *t=NULL; /* Get current time */ now = time(NULL); tm = localtime(&now); o.stats.startRuntime(); /* Some run-time tests to ensure everything works as expected */ do_safe_checks(); /* Init a few things on Windows */ #ifdef WIN32 win_pre_init(); win_init(); #endif /* Register the SIGINT signal so when the users presses CTRL-C we print stats * before quitting. */ #if HAVE_SIGNAL signal(SIGINT, signal_handler); #endif /* Let's parse and validate user supplied args */ a.parseArguments(argc, argv); o.validateOptions(); /* ISO 8601 date/time -- http://www.cl.cam.ac.uk/~mgk25/iso-time.html */ if ( strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M %Z", tm) <= 0) outFatal(QT_3,"Unable to properly format time"); outPrint(QT_1, "\nStarting %s %s ( %s ) at %s", NPING_NAME, NPING_VERSION, NPING_URL, tbuf); /*If nping is called on something that doesn't take port scanning * we should alert the user that their port command is going to be ignored * I choose to print out a Fatal error since the scan doesn't make sense. */ if(o.issetTargetPorts() && !o.scan_mode_uses_target_ports(o.getMode())) outFatal(QT_3, "You cannot use -p (explicit port selection) in your current scan mode.\n(Perhaps you meant to use --tcp or --udp)"); /* Resolve and cache target specs */ outPrint(DBG_2,"Resolving specified targets..."); o.targets.processSpecs(); if( ((i=o.targets.getTargetsFetched())<=0) && o.getRole()!=ROLE_SERVER ) outFatal(QT_3, "Execution aborted. Nping needs at least one valid target to operate."); else outPrint(DBG_2,"%lu target IP address%s determined.", i, (i==1)? "":"es" ); switch( o.getRole() ){ case ROLE_NORMAL: prob.start(); prob.cleanup(); break; case ROLE_CLIENT: t=o.targets.getNextTarget(); o.targets.rewind(); ec.start(t, o.getEchoPort() ); ec.cleanup(); break; case ROLE_SERVER: o.stats.startClocks(); es.start(); es.cleanup(); o.stats.stopClocks(); break; default: outFatal(QT_3, "Invalid role %d\n", o.getRole() ); break; } /* Display stats, clean up and quit */ o.stats.stopRuntime(); o.displayStatistics(); o.displayNpingDoneMsg(); o.cleanup(); exit(EXIT_SUCCESS); exit(EXIT_SUCCESS); } /* End of main() */ /* Things that should be guaranteed by the compiler, standard library, OS etc, * but that we check just in case... */ int do_safe_checks(){ IPv6Header i; if( (sizeof(u32) != 4) || (sizeof(u16) != 2) || (sizeof(u8) != 1) ) outFatal(QT_3,"Types u32, u16 and u8 do not have the correct sizes on your system."); //if (i.test_correctness() == false) // outError(QT_2,"IPv6 may not work on your system. Please report a bug."); test_stuff(); /* Little function that is called quite early to test some misc stuff. */ return OP_SUCCESS; } /* End of do_safe_checks() */ /** Use this function whenever you have some code that you want to test, but * you don't want to bother creating a new dummy main.c file, etc. This * function is called by do_safe_checks() at the beginning of nping execution. * Command line arguments have not been parsed yet so even if you run nping * with no arguments you will not get an error, and this function will be * called. You probably want to place an exit() call at the end of your * testing code so Nping does not actually continue its normal execution path * but exit after your tests. */ void test_stuff(){ return; } /* End of test_stuff() */ /** This function is called whenever user presses CTRL-C. Basically what we * do here is stop Tx and Rx clocks, stop global clock, display statistics, * do a bit of cleanup and exit the program. The exit() call makes the * program return EXIT_FAILURE instead of the usual EXIT_SUCCESS. * * TODO: Many of the things done in this function may not be safe due to * reentrancy issues. Check http://seclists.org/nmap-dev/2009/q3/0596.html * and http://seclists.org/nmap-dev/2009/q3/0596.html */ void signal_handler(int signo){ fflush(stdout); outPrint(DBG_1,"signal_handler(): Received signal %d", signo); switch(signo) { case SIGINT: o.stats.stopTxClock(); o.stats.stopRxClock(); o.stats.stopRuntime(); o.displayStatistics(); o.displayNpingDoneMsg(); o.cleanup(); fflush(stderr); exit(EXIT_FAILURE); break; default: outError(QT_2, "signal_handler(): Unexpected signal received (%d). Please report a bug.", signo); break; } fflush(stderr); exit(EXIT_FAILURE); } /* End of signal_handler() */